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Group signatures allow members of a group to anonymously produce signatures on behalf of the group. They are an important building block for privacy-enhancing applications, e.g., enabling user data to...
Simulation-based Receiver Selective Opening CCA Secure PKE from Standard Computational Assumptions
public key encryption receiver selective opening security chosen ciphertext security
2018/11/12
In the situation where there are one sender and multiple receivers, a receiver selective opening (RSO) attack for a public key encryption (PKE) scheme considers adversaries that can corrupt some of th...
Simulation-Based Selective Opening Security for Receivers under Chosen-Ciphertext Attacks
simulation-based security selective opening security for receivers chosen-ciphertext attacks
2018/8/21
Security against selective opening attack (SOA) for receivers requires that in a multi-user setting, even if an adversary has access to all ciphertexts, and adaptively corrupts some fraction of the us...
Key Dependent Message Security and Receiver Selective Opening Security for Identity-Based Encryption
Identity-based encryption Key dependent message security Receiver selective opening security
2017/10/10
We construct two identity-based encryption (IBE) schemes. The first one is IBE satisfying key dependent message (KDM) security for user secret keys. The second one is IBE satisfying simulation-based r...
From Selective IBE to Full IBE and Selective HIBE
public key encryption identity-based encryption Hierarchical Identity-Based-Encryption
2017/9/30
Starting with any selectively secure identity-based encryption (IBE) scheme, we give generic constructions of fully secure IBE and selectively secure hierarchical IBE (HIBE) schemes. Our HIBE scheme a...
All-But-Many Lossy Trapdoor Functions and Selective Opening Chosen-Ciphertext Security from LWE
LWE lossy trapdoor functions chosen-ciphertext security
2017/9/14
Selective opening (SO) security refers to adversaries that receive a number of ciphertexts and, after having corrupted a subset of the senders (thus obtaining the plaintexts and the senders' random co...
Selective Opening Security from Simulatable Data Encapsulation
selective opening hybrid encryption mode of operation
2016/12/10
The confidentiality notion of security against selective opening attacks considers adversaries
that obtain challenge ciphertexts and are allowed to adaptively open them, thereby revealing
the encryp...
From Weakly Selective to Selective Security in Compact Functional Encryption
Functional Encryption Compactness Provable Security
2016/12/10
Functional Encryption (FE) generalizes the notion of traditional encryption system by providing finegrained
access control. In a functional encryption scheme, the owner of the secret key can generate...
Selective-Opening Security in the Presence of Randomness Failures
selective-opening security deterministic encryption nonce-based PKE
2016/12/9
We initiate the study of public-key encryption (PKE) secure against selective-opening attacks (SOA) in
the presence of randomness failures, i.e., when the sender may (inadvertently) use low-quality r...
Constructions Secure against Receiver Selective Opening and Chosen Ciphertext Attacks
receiver selective opening chosen ciphertext security hash proof system
2016/12/7
We present a general construction of RSO security against chosen ciphertext attacks (RSO-CCA) by combining any RSO secure scheme against chosen plaintext attacks (RSO-CPA) with any regular CCA secure ...
A Quasipolynomial Reduction for Generalized Selective Decryption on Trees
Nested Hybrids Broadcast Encryption Multicast Encryption
2016/4/21
Generalized Selective Decryption (GSD), introduced by Panjwani [TCC’07], is a game for a symmetric encryption scheme Enc that captures the difficulty of proving adaptive security of certain protocols,...
On the Selective Opening Security of Practical Public-Key Encryption Schemes
public key encryption selective opening security SIM-SO-CCA
2016/4/6
We show that two well-known and widely employed public-key encryption schemes – RSA Optimal
Asymmetric Encryption Padding (RSA-OAEP) and Diffie-Hellman Integrated Encryption Scheme
(DHIES), instanti...
Public-Key Encryption with Simulation-Based Selective-Opening Security and Compact Ciphertexts
Public-key encryption selective-opening security lossy encryption
2016/2/24
In a selective-opening (SO) attack on an encryption scheme, an adversary A gets a number of ciphertexts (with possibly related plain- texts), and can then adaptively select a subset of those ciphertex...
The utilization of private Attribute-based credentials (ABC) in everyday life could enable citizens to only partially reveal their identity in economic transactions and communication with public insti...
Dual System Encryption via Doubly Selective Security: Framework, Fully-secure Functional Encryption for Regular Languages, and More
Dual system encryption Functional encryption for regular languages Attribute-based encryption
2016/1/9
Dual system encryption techniques introduced by Waters in Crypto’09 are powerful approaches
for constructing fully secure functional encryption (FE) for many predicates. However,
there are still som...